Electric switch.



0. TQSNYDER.`

ELECTRIC SWITCH.

APPLICATION man Nov. 11, 1914.

1 l 85,85' 1 Patented June 6, 1916.

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UNITED sTATEs PATENT oEEroE.

OWEN T. SNYDER, 0F COLUMBUS, OHIO', ASSIGNOR TO OWEN 'l'. SNYDER &COMPANY, A

FIRM COMPOSED OF OEN T. SNYDER .AND LOUIS F. FIESER, BOTH OF COLUMBUS,

OHIO.

ELECTRIC SWITCH.

Specicaton of Letters Patent.

Patented June 6, 1916.

Application led November 11, 1914. Serial No. 871,608.

a quick making and breaking of the eirv cuit controlled.

The main object of my invention resides in providing a structure of thistype wherein resilient means are provided for bridging the gap in anopen circuit, these resilient means being used in effecting the closureof the circuit and also for maintaining the circuit closed by a springcontrolled contact member.

A further object of my invention resides in the provision of a push rodcarrying a resilient extension which extension is so arranged that itoperates upon the pivotally mounted contact closure control arm in suchmanner that the spring extension bears on this arm on one side` -of itspivot point when in open position and upon the opposite side of thispivot point when in closed position.

My invention also resides in the specific structure shown, other objectsresulting therefrom being more apparent after a further detaileddescription of the accompanying sheet of drawings, in which similarcharacters of reference designate corresponding parts, and in which:

.Figure 1 is a face view of my switch shown in closed position with thecover plate removed, Fig. 2 is a view similar to Fig. 1 and showing theswitch in open position, Fig. 3 is a section taken on line 3-3 of Fig.1, and Fig. 4 is 'a-section taken on line 4-4 of Fig. 3.

In carrying out my invention, I have provided a casing member 1 ofrectangular form preferably held closed by the cover structure shown at2. This casing is provided with a plurality of openings to receive wireconducting conduits 3. Two of the conduits shown in the present drawingare provided with wires 4, these wires leading into the 'switch casingand the circuits they control 1 is a push rod 5 carrying a handle orbearmg knob 6. This push rod is suitably journaled in the boss 7 in theend of the casing and in the upstanding bearing member 8 so that onlylinear movement is possible. This push rod is held in retracted positionor the position shown in Fig. 2 by the interposition of the coiledspring 9 between the bearing member 8 and a shoulder element 10 securelymounted upon this push rod. At its forward end there are attached twoleaf springs 11 carrying bearing members 12 at their ends opposite fromwhich they are attached, which bearing members are provided with rollers13. Thesev rollers 13 are de- SignedF to resiliently bear against arms14 pivoted to the casing 1 intermediate their ends as is shown at 15. Atthe forward ends of these arms there is attached a small strip ofinsulation 16 which pieces of insulation pivotally carry at their otherends contact or bridging members 17. These bridging members are of alength and shape to bridge the gap between each pair of binding posts 18carried upon a suitable block of insulation 19 within the casing 1. Itis to these binding posts that the incoming wires 4.- are attached as isshown "and movement of the contact members 17 to a position ofengagement with these posts as is shown in Fig. 1, will effect theclosure of the circuits.

My invention is particularly applicable to clrcuits designed to beclosed by such movlng parts as elevator or other doors, etc., it beingessential that the completion and breaking of the circuit be effectedvery rapidly. y

The manner of operation ofA my device is as follows, it being assumedtwo circuits are under the control of the switch member as is shown,although it will be apparent that the use of two circuits is notessential to the practising of my invention. The leaf springs l11 are ofsuch tension that the pivoted arms 14 will be held in the position shownin Fig. 2 when the push rod 5 is in its retracted position since therollers 13 bear on the ends of the arms 14 beyond their pivot points 15.The movement of the push rod 5 to the posi- Ytion shown in Fig. 1 causesthe resilient eX- 'the contact or bridging strips'l? are pivotallymounted to the insulating 'strips 16, they will readily adjustthemselves to a perfect contacting between each pair of binding posts 18as is shown'. The degree of pressure of these contact members upon theirrespective binding posts is of course determined by the tensionexercised by thel leaf springs 11. Release of the push rod from theposition shown in Fig. 1 causes a breaking of the circuits thus made bythe automatic action of the coil spring 9.

What I claim, is:

1. An electric switch comprising a casing, a lpush rod slidably mountedwithin said easing, resilient means for normally holding said rodl inits outermost position, an arm pivoted intermediate its ends, yieldingmeans carried by said rod arranged to bear on said arm on one side ofits pivot point when said rod is in its outermost position and on theopposite side of said pivot point when said rod is in its innermostposition, a pair of binding posts, and a contact member pivotallycarried by one end of said arm and arranged to engage said posts whensaid rodis in one of said positions.

2. An electric switch comprising a casing, a push rod slidably mountedwithin said casing, resilient means for normall holding said rod in itsoutermost posltion, a double pair of spaced binding posts, the pairslocated along opposite sides of said casing and on opposite sides ofsaid rod, a pair of arms pivoted intermediate their ends and on oppositesides of said rod, a pair of resilient extensions on said rod arrangedto tion and on the opposite side of said pivot point when said rod is inits innermost position, and a contact member pivoted to each-L arm at apoint betweenthe posts of each pair of posts and arranged to engage theposts of each pair when said rod is in its innermost position.

3. An electric switch comprising a push rod, guiding means for said rod,an engaging means on said rod, an arm pivoted intermediate its ends,said engaging means being arranged to bear on said arm on one side ofits pivot point when said rod is in its outermost position and on theopposite side of said pivot point when said rod is in its innermostposition a pair of binding posts, and a contact member pivoted to saidarm at a point to lie between said posts and arranged to engage theposts when said rod is in one of said positions.

4. An electric switch comprising a push rod, guiding means for said rod,and engaging means on said rod, an arm pivoted intermediate its ends,said engaging means being arranged to bear on said arm on one side ofits pivot point when said rod is in a 'corresponding position and on theopposite side of said pivotpoint when said rod is in a correspondingposition, a pair of binding posts, and a pivotally supported contactmember operatively mounted in connection with said arm to one side ofits pivot point arranged to engage the posts when said rod is in one ofsaid positions.

In testimony whereof I aiiix my signature in presence of two witnesses.

OWEN T. SNYDER.

Witnesses:

WALTER E. L. Boon, A. L. PHELPS.

